Nerve stimulation is a medical technique that involves sending electrical impulses to specific nerves in the body. This method can help manage pain, improve muscle function, and treat various conditions such as chronic pain, epilepsy, and depression. Devices like transcutaneous electrical nerve stimulation (TENS) units are commonly used for this purpose. The process works by interrupting pain signals before they reach the brain, providing relief to patients. Nerve stimulation can be applied through non-invasive methods, such as skin patches, or through surgical implants that deliver impulses directly to targeted nerves.